"I know. But you'll always choose Sumaru first. And I understand why. Let's enjoy what we can have instead of worrying about what we can't, okay?"

This is what happens when you keep putting these talks off, Katsuya. She brings things up when she can, even if it means ruining her own birthday. But she still has cake, and the cake isn't going to run off and leave her until Naugus gets home.